Lock and latch mechanism.



PATENTBD JAN. 9, 1906.

- H. G. VOIGHT. LOCK AND LATCH MECHANISM.

APPLICATION FILED MAR.27. 1905.

iliifil/ O -Ill UNITED STATES PATENT OFFICE.

HENRY G. VOIGHT, OF NEW BRITAIN,

CONNECTICUT, 'ASSIGNOR TO RUSSELL & ERW IN MANUFACTURING COMPANY, OF NEW BRIT- AIN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

Specification of Letters Patent.

Patented Jan. 9, 1906.

Application filed March 27, 1905- Serial No. 252,125-

To all whom it may concern.-

Be it known that I, HENRY G. VOIGHT, a citizen of the United States, residing at New Britain, county of Hartford, State of Connecticut, have invented certain new and useful Improvements in Look and Latch Mechanism, of which the following is a full, clear, and exact description.

My invention relates to improvements in look and latch mechanism, and particularly to such mechanism as is intended for use on hinged doors for holding the door in its closed position.

The object of the invention is to provide a simple construction the parts of which may be assembled at the factory and sent out to be attached to the edge of a door in such a way that the alinement of the parts will not be interfered with. Since doors, even when intended to be of a calculated thickness, often vary somewhat therefrom, I have constructed the parts so that they may be adjusted to doors of different thicknesses without interfering with the proper operation of the mechanism. I have further sought to perfect a mechanism in which the operating parts are accessible only from the inner side of the door, so that it is practically impossible for the lock to be picked from the outside.

The invention consists in improvements the principles of which are illustrated in the accompanying single sheet of drawings. Briefly considered, the invention contemplates the use of plates adapted to the opposite sides of a door, of latch or bolt mechanism carried by an end plate, of mechanism carried by the inner plate for operating the latch-bolt by the turning of either an inner or outer knob, there being a shank extending from the outer knob and supported by the inner plate, and the parts being so connected that the opera tion of the mechanism is not interfered with, even though the distance between the plates be somewhat varied.

Figure 1 is a horizontal section of a mechanism embodying the improvements of my invention as applied to the fragment of the edge of a door. Fig. 2 is a view of the inside of the inner plate with the operating mechanism, the latch-bolt, outer knob-shank, and connecting-screws being shown in section. Fig. 3 is a fragmentary horizontal sectional view showing the connection between the knob-shank-and latch-slide. Fig. 4 is a detail view showing the means for supporting the inner end of the outer knob-shank. Fig. 5 shows details of an adjusting-screw for operating the supporting means for the inner end of the outer knob-shank. Fig. 6 is a detail view showing a fragment of the inner plate and the adjusting-screws.

1 indicates a fragment of the edge of a door. For the purpose of attaching my invention to the door it is simply necessary to cut a small notch in the edge of the door and bore a transverse hole for the knob-shank. In addition I prefer to bore one or more transverse holes back of the knob-shank passage for additional securing-screws.

2 is the outer side plate of the mechanism, which provides a bearing for the outer knob.

3 is an end plate which extends across the end of the door and is preferably carried by the outer side plate and has an opening for the latch-bolt.

4 is the inner side plate, which affords a guiding connection for the end plate 3 and supplies a bearing for the inner knob. This inner side plate also carries the latch-operating mechanism.

5 5 are posts which extend from the inner side plate 4 and are seated in recesses in the outer side plate 2, In the form herein shown these posts are screw-threaded and accessible through the inner plate, so that they may serve to draw the two side plates together.

6 6 are two screws which may be employed for drawing the two side plates together at the rear. These are both accessible from the inner side of the door only.

I 7 is a pivotally-mounted latch-bolt, which is adapted to extend through the opening in the end plate 3 or be retracted.

8 is a spring for normally projecting the latch-bolt through the opening in the end late.

p 9 is the operating-slide carried by the inner side plate 4 and preferably guided by a series of lugs 10 10 10 10.

11 11 are arms carried by the slide 9, having forked extremities for engaging with pins 12 12, carried by the latch-bolt 7. These arms are pivotally mounted, so that the latch-bolt may be retracted by its contact with the striker-plate without afiecting the latch-slide 9.

13 13 are shoulders carried by the latchslide, which normally engage the arms 11 11 beyond their pivotal supports, so that when the latch-slide is drawn back the arms 11 11 are drawn back similarly, as if they were a rigid part thereof, thus causing the retraction of the latch-bolt 7.

It will be noticed that none of this latchoperating mechanism is accessible from the outside of the door.

14 and 15 represent the inner and outer knobs, respectively, for actuating the latch mechanism.

16 is an extension from the shank of the inner knob, which fits into a slot in the inner end of the shank 17 of the outer knob.

18 is a roll-back also mounted in the recess in the inner end of the knob-shank 17 and retatable with said knob shank by either of said knobs. The inner knob is secured in place, but rotatable in the inner plate 4, in any suitable manner.

19 and 20 are clamping and supporting members pivoted to the inner plate 4 and engaging in channels in the inner end of the outer knob-shank 17.

21 is a screw carried by the inner plate 4 and accessible from the inner side of the door. 22 is an eccentric-pin projecting therefrom and taking into a slot in the clamping member 19. 23 is a similar screw having a proj ection 24 engaging in a slot in the clamping member 20. The clamping members may be retracted so as to release the inner end of the knob-shank 17 by simply rotating the screws 21 and 23. When the outer knobshank 17 is in position, the roll-back 18 is held in place by its engagement in the bottom of the slot in the knob-shank 17 and by the inner end of the inner knob-shank extension 16. In the form herein shown it is also guided by its contact with the clamping members 19 and 20.

The mechanism may be removed from the door after screws 5 and 6 are taken out by simply rotating the screws 21 and 23 suificiently to retract the clamping members 19 and 20 from their engagement with the inner end of the outer knob-shank. When the inner side plate 4 is taken ofi, the outer side plate 2 may be taken ofii, since the roll-back 18 is only carried loosely by the knob-shank 17, and the connection between the latchslide and the latch-bolt is a sliding one.

The parts may of course be assembled or applied to a door in reverse order. From the method of construction all the parts have a permanent and definite alinement relative to one another irrespective of the position in which they are assembled and whether applied to a door or not.

The advantages of such a construction other than those set forth in detail herein will be apparent to .those who are skilled in this art.

What I claim is- 1. In a mechanism of the character described, the combination of inner and outer side plates, an end plate, a latch-bolt carried by said end plate, an operating-slide with connections for the latch-bolt carried by the inner side plate, an inner knob having bearings in the inner side plate, an outer knob having a bearing in the outer side plate, and a shank extending from the outer knob and provided with means of connection with the operating-slide, said outer side plate being adjustable to and fro relative to said outer knob-shank.

2. In a mechanism of the character described, inner and outer side plates, an end plate, said side plates being adjustable to doors of difi erent thicknesses, a latch-bolt, latch-operating mechanism carried by one of said side plates, a knob rotatably carried by the same side plate but having a fixed lateral position relative thereto, a second knob having a shank extending through the other side plate and movement therethrough, and means of con nection between said shank and said operating mechanism independent of the thickness of the door.

3. In a mechanism of the character described, the combination of two side plates adapted to the opposite sides of a door, an end plate carried by one of said side plates, a pivotally-mounted latch-bolt carried by said end plate, an operating-slide carried by the opposite side plate, an arm pivotally carried .by said operating-slide and engaging said latch-bolt, and a shoulder carried by said operating-slide engaging said arm, an accessible actuating means at each side of said mechanism with connections for said operating-slide whereby said latch-bolt may be retracted independently of said slide by means of a striker-plate or retracted with said slide by said actuating means, and independently of the thickness of the door to which the mechanism is applied.

4. In a mechanism of the character described, inner and outer side plates, means for alining said plates, operating mechanism carried by the inner side plate, inner and outer knobs, a long shank projecting from the outer 'knob, means of connection between said knobs and said operating mechanism, clamping and supporting means for the inner end of said outer shank carried by the inner side plate, and means for releasing the same.

5. In a mechanism of the character described, an inner side plate, a knob rotatably carried thereby, a latch-bolt, operating means therefor carried by said side plate, an outer side plate, a knob rotatably mounted but longitudinally movable in said outer side rotatable therein, but capable of" plate, and means for removably supporting the inner end of said outer knob-shank, said means being carried by said inner side plate.

6. In a mechanism of the character described, inner and outer side plates, a latchbolt, an operating-slide therefor, a knob rotatably carried by one of said side lates, a second knobhaving a bearing in t e other side plate and having a shank extending therethrough, clamping means carried by the first side plate for supporting the end of saidshank, means for releasing said clamping means, and means of connection between said side plates whereby they may be applied to doors of different thicknesses.

7. In a mechanism of the character described, inner and outer side plates adjustable to and fro and adapted to doors of different thicknesses, an end plate carried by one of said side plates, a latch-bolt carried thereby, an. operating-slide carried by one of said side plates, a knob carried by said side plate, a but longitudinally movable throu h the outer side plate, means carried by t e first side plate for supportin the opposite end of said shank, and means 0 connection between said shank and said operating-slide.

HENRY G. VOIGHT. Witnesses:

M. S. WIARD, (J. E. RUssELL.

knob having a shank supported in 

